/* Enhanced responsive styles with improved visual design */
:root{
  --accent:#2b6cb0;
  --accent-light:#3b82f6;
  --muted:#6b7280;
  --container:950px;
  --shadow:0 4px 20px rgba(0,0,0,0.08);
  --shadow-hover:0 8px 30px rgba(0,0,0,0.12);
}

*{box-sizing:border-box}

body{
  font-family:Inter,Segoe UI,Roboto,Arial,sans-serif;
  margin:0;
  color:#111;
  line-height:1.6;
  background:#fff;
  -webkit-text-size-adjust:100%;
  text-size-adjust:100%;
}

.container{
  max-width:var(--container);
  margin:0 auto;
  padding:1rem;
}

.site-header{
  background:#fff;
  border-bottom:1px solid #e6e6e6;
  position:sticky;
  top:0;
  z-index:20;
  box-shadow:var(--shadow);
}

.site-header .container{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:0.75rem 1rem;
}

.logo{
  font-weight:700;
  color:var(--accent);
  font-size:1.7rem;
  margin:0;
}

.site-header nav a{
  margin-left:1.5rem;
  text-decoration:none;
  color:var(--muted);
  font-weight:500;
  transition:color 0.2s ease;
  padding:0.5rem 0.25rem;
  min-height:44px;
  display:inline-flex;
  align-items:center;
}

.site-header nav a:hover{
  color:var(--accent);
}

.hero{
  background:linear-gradient(135deg,rgba(43,108,176,0.06),rgba(59,130,246,0.04));
  padding:4rem 0;
}

.hero h2{
  font-size:1.9rem;
  font-weight:700;
  color:var(--accent);
  margin:0 0 1rem 0;
  line-height:1.2;
}

.hero-grid{
  display:grid;
  grid-template-columns:2fr 1fr;
  gap:2rem;
  align-items:start;
}

.hero-card{
  background:#fff;
  border-radius:12px;
  padding:1.5rem;
  box-shadow:var(--shadow);
  border:1px solid #f0f0f0;
}

.hero-card h3{
  margin-top:0;
  color:var(--accent);
}

.btn{
  display:inline-block;
  padding:0.75rem 1.5rem;
  border-radius:8px;
  background:var(--accent);
  color:#fff;
  text-decoration:none;
  font-weight:600;
  transition:all 0.2s ease;
  border:none;
  cursor:pointer;
  min-height:44px;
  min-width:44px;
  text-align:center;
}

.btn:hover{
  background:var(--accent-light);
  transform:translateY(-1px);
  box-shadow:var(--shadow-hover);
}

.section{
  padding:2.5rem 0;
}

.section h2{
  font-size:2rem;
  font-weight:700;
  color:var(--accent);
  margin:0 0 1.5rem 0;
  text-align:center;
}

.section p{
  text-align:center;
  color:var(--muted);
  font-size:1.1rem;
  margin-bottom:2.5rem;
  line-height:1.6;
  max-width:800px;
  margin-left:auto;
  margin-right:auto;
}

.band{
  background:#fafafa;
  border-top:1px solid #f0f0f0;
  border-bottom:1px solid #f0f0f0;
}

.approach-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(250px,1fr));
  gap:1.5rem;
  margin-top:2rem;
}

.approach-item{
  text-align:center;
  padding:1rem;
}

.approach-item h3{
  color:var(--accent);
  margin:0 0 0.5rem 0;
  font-size:1.2rem;
}

.approach-list{
  max-width:900px;
  margin:2.5rem auto 0;
  padding:0;
  list-style:none;
}

.approach-list li{
  margin:1.5rem 0;
  padding:1rem 0;
  font-size:1.05rem;
  line-height:1.7;
}

.approach-list li strong{
  color:var(--accent);
  font-weight:600;
}

.approach-list-bullets{
  max-width:900px;
  margin:2rem auto 0;
  padding:0 0 0 1.5rem;
  list-style:disc;
}

.approach-list-bullets li{
  margin:0.8rem 0;
  padding:0.3rem 0;
  font-size:1.05rem;
  line-height:1.5;
}

.approach-list-bullets li strong{
  color:var(--accent);
  font-weight:600;
}

.cards{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
  gap:2rem;
  margin-top:2.5rem;
}

.cards-grid-2x2{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:2rem;
  margin-top:2.5rem;
}

.card{
  background:#fff;
  padding:2rem;
  border-radius:12px;
  box-shadow:var(--shadow);
  border:1px solid #f0f0f0;
  transition:all 0.2s ease;
}

.card:hover{
  transform:translateY(-2px);
  box-shadow:var(--shadow-hover);
}

.card h3{
  color:var(--accent);
  margin:0 0 1rem 0;
  font-size:1.1rem;
  font-weight:600;
}

.card p{
  text-align:left;
  margin:0 0 1rem 0;
  line-height:1.6;
}

.card ul{
  margin:0.5rem 0 1rem 0;
  padding-left:1.2rem;
  line-height:1.6;
}

.card li{
  margin:0.3rem 0;
  line-height:1.5;
}

.card p:last-child{
  margin-bottom:0;
}

.grid-2{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:1.5rem;
  margin:2rem 0;
}

.viz-single-column{
  display:flex;
  flex-direction:column;
  gap:1.5rem;
  margin:2rem 0;
  max-width:600px;
  margin-left:auto;
  margin-right:auto;
}

.viz-card{
  background:#fff;
  padding:1.5rem;
  border-radius:12px;
  box-shadow:var(--shadow);
  border:1px solid #f0f0f0;
}

.viz-card h4{
  margin:0 0 1rem 0;
  color:var(--accent);
  font-size:1rem;
  font-weight:600;
  text-align:center;
}

.viz-image{
  width:100%;
  height:auto;
  max-width:630px;
  display:block;
  margin:0 auto;
  border-radius:8px;
  box-shadow:0 2px 8px rgba(0,0,0,0.1);
}

.viz-citation{
  margin:0.75rem 0 0 0;
  font-size:0.8rem;
  color:var(--muted);
  text-align:center;
  font-style:italic;
  line-height:1.4;
}

.viz-citation a{
  color:var(--accent);
  text-decoration:none;
}

.viz-citation a:hover{
  text-decoration:underline;
}

.contact-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:2rem;
  margin-top:2rem;
}

.contact-vertical{
  display:flex;
  flex-direction:column;
  gap:1rem;
  margin-top:1.5rem;
  max-width:600px;
  margin-left:auto;
  margin-right:auto;
}

.contact-info{
  background:#fff;
  padding:1.25rem;
  border-radius:8px;
  box-shadow:var(--shadow);
  border:1px solid #f0f0f0;
}

.contact-info h3{
  color:var(--accent);
  margin:0 0 0.75rem 0;
  font-size:1.1rem;
}

.contact-info p{
  margin:0.5rem 0;
  line-height:1.5;
}

.contact-info p:last-child{
  margin-bottom:0;
}

.cv-link{
  color:var(--accent);
  text-decoration:none;
  font-weight:600;
  display:inline-block;
  margin-top:0.5rem;
  transition:color 0.2s ease;
}

.cv-link:hover{
  color:var(--accent-light);
}

.contact-email-center{
  text-align:center;
}

.contact-form-section{
  max-width:100%;
  margin:3rem auto 0;
  background:#fff;
  padding:2rem;
  border-radius:12px;
  box-shadow:var(--shadow);
  border:1px solid #f0f0f0;
}

.contact-form-section h3{
  color:var(--accent);
  margin:0 0 0.5rem 0;
  font-size:1.4rem;
  text-align:center;
}

.contact-form-section p{
  text-align:center;
  margin-bottom:2rem;
  color:var(--muted);
}

.contact-form{
  max-width:100%;
}

.form-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:1rem;
  margin-bottom:1rem;
}

.form-group{
  display:flex;
  flex-direction:column;
  width:100%;
  margin:0;
  padding:0;
}

.form-group label{
  font-weight:600;
  color:var(--accent);
  margin-bottom:0.5rem;
  font-size:0.9rem;
  display:block;
  width:100%;
}

.form-group input,
.form-group textarea{
  padding:0.75rem;
  border:1px solid #ddd;
  border-radius:6px;
  font-size:1rem;
  width:100%;
  box-sizing:border-box;
  transition:border-color 0.2s ease,box-shadow 0.2s ease;
  margin:0;
}

.form-group input::placeholder{
  color:#999;
  font-style:italic;
}

.form-group input:focus,
.form-group textarea:focus{
  outline:none;
  border-color:var(--accent);
  box-shadow:0 0 0 2px rgba(52,152,219,0.2);
}

.form-group textarea{
  resize:vertical;
  min-height:100px;
}

.btn-form{
  background:var(--accent);
  color:#fff;
  border:none;
  padding:0.875rem 2rem;
  border-radius:6px;
  font-size:1rem;
  font-weight:600;
  cursor:pointer;
  transition:all 0.2s ease;
  margin-top:1rem;
  display:block;
  margin-left:auto;
  margin-right:auto;
}

.btn-form:hover{
  background:var(--accent-light);
  transform:translateY(-1px);
  box-shadow:var(--shadow);
}

.btn-form:disabled{
  background:#ccc;
  cursor:not-allowed;
  transform:none;
  box-shadow:none;
}

.form-message{
  text-align:center;
  padding:1.5rem;
  border-radius:8px;
  margin-top:1rem;
  background:#e8f5e8;
  border:1px solid #c3e6c3;
  color:#2d5a2d;
}

.form-message.form-error{
  background:#fce4e4;
  border:1px solid #f5c6c6;
  color:#721c24;
}

.form-message h4{
  margin:0 0 0.5rem 0;
  font-size:1.1rem;
}

.form-message p{
  margin:0.5rem 0 0 0;
  font-size:0.95rem;
}

.site-footer{
  padding:2rem 0;
  text-align:center;
  color:var(--muted);
  font-size:0.9rem;
  background:#f8f9fa;
  border-top:1px solid #e9ecef;
}

.small{
  font-size:0.9rem;
  color:var(--muted);
  text-align:center;
  margin-top:1rem;
}

@media(max-width:800px){
  .hero h2{
    font-size:1.6rem;
    line-height:1.3;
  }
  .hero-grid{
    grid-template-columns:1fr;
    gap:1.5rem;
  }
  .hero{
    padding:2rem 0;
  }
  .grid-2{
    grid-template-columns:1fr;
    gap:1.5rem;
  }
  .approach-grid{
    grid-template-columns:1fr;
  }
  .contact-grid{
    grid-template-columns:1fr;
    gap:1.5rem;
  }
  .contact-vertical{
    gap:1rem;
    margin-top:1.25rem;
  }
  .viz-single-column{
    gap:1rem;
    margin:1rem 0;
    max-width:100%;
  }
  .cards{
    grid-template-columns:1fr;
    gap:1.5rem;
  }
  .cards-grid-2x2{
    grid-template-columns:1fr;
    gap:1.5rem;
  }
  .contact-form-section{
    margin:2rem auto 0;
    padding:1.5rem;
  }
  .site-header nav a{
    margin-left:0.8rem;
    font-size:0.85rem;
  }
  .section{
    padding:2rem 0;
  }
  .section h2{
    font-size:1.6rem;
    margin-bottom:1rem;
  }
  .section p{
    font-size:1rem;
    margin-bottom:1.5rem;
    padding:0 0.5rem;
  }
  .card{
    padding:1.5rem;
  }
  .approach-list{
    padding:0 1rem;
  }
  .approach-list li{
    margin:1rem 0;
    padding:0.75rem 0;
    font-size:1rem;
  }
  .approach-list-bullets{
    padding:0 1rem 0 2rem;
  }
  .approach-list-bullets li{
    margin:0.6rem 0;
    padding:0.2rem 0;
    font-size:1rem;
    line-height:1.4;
  }
}

/* Additional mobile optimization for very small screens */
@media(max-width:480px){
  .container{
    padding:0.75rem;
  }
  .hero h2{
    font-size:1.3rem;
  }
  .hero{
    padding:1.5rem 0;
  }
  .section{
    padding:1.5rem 0;
  }
  .section h2{
    font-size:1.4rem;
  }
  .section p{
    font-size:0.95rem;
    padding:0;
  }
  .logo{
    font-size:1.4rem;
  }
  .site-header .container{
    padding:0.5rem 0.75rem;
  }
  .site-header nav a{
    margin-left:0.6rem;
    font-size:0.8rem;
  }
  .card{
    padding:1.25rem;
  }
  .card h3{
    font-size:1rem;
  }
  .approach-list{
    padding:0 0.5rem;
  }
  .approach-list li{
    font-size:0.95rem;
    line-height:1.6;
  }
  .approach-list-bullets{
    padding:0 0.5rem 0 1.5rem;
  }
  .approach-list-bullets li{
    margin:0.5rem 0;
    padding:0.1rem 0;
    font-size:0.95rem;
    line-height:1.5;
  }
  .contact-vertical{
    gap:0.75rem;
  }
  .contact-info{
    padding:1rem;
  }
  .viz-card{
    padding:1rem;
  }
  .viz-card h4{
    font-size:0.9rem;
  }
  .btn{
    padding:0.65rem 1.25rem;
    font-size:0.9rem;
  }
  .contact-form-section{
    margin:1.5rem auto 0;
    padding:1rem;
  }
  .contact-form-section h3{
    font-size:1.2rem;
  }
  .form-row{
    grid-template-columns:1fr;
    gap:0.75rem;
    margin-bottom:0.75rem;
  }
  .form-group{
    margin:0;
    padding:0;
  }
  .form-group input,
  .form-group textarea{
    padding:0.65rem;
    font-size:0.9rem;
    width:100%;
    max-width:100%;
    margin:0;
  }
  .form-group label{
    font-size:0.85rem;
    margin-bottom:0.4rem;
    width:100%;
  }
  .btn-form{
    padding:0.75rem 1.5rem;
    font-size:0.9rem;
    width:auto;
    max-width:300px;
  }
}